High temperature thermoelectric properties of CoNb1−xHfxSn1−ySby half-Heusler compounds

Enhanced thermoelectric properties of n-type NbCoSn half-Heusler by improving phase purity

“…As a result, the purity is improved when comparing with other approaches. [16][17][18][19] Electron transport significantly benefits from phase purification, leading to simultaneous enhancement of electrical conductivity and Seebeck coefficient. The highest power factor obtained by this method is ∼34 µW cm −1 K −2 , which is 80% higher than Ono's reported value.…”

Thermoelectric properties of half-Heusler alloys Zr1−xYxNiSn1−ySby

“…The combination of the substitution by Y and Sb may be effective for the reduction of the thermal conductivity as well as electrical resistivity. Such investigation on the effect of the double-substitution has been reported by Kawaharada et al about CoNb 1−x Hf x Sn 1−y Sb y system [12]. Next, we have investigated the thermoelectric properties of Zr 1−x Y x NiSn 1−y Sb y system.…”

“…The thermoelectric properties of ZrNiSn may be differently affected by the different substituent. For example, the substitution for Zr or Sn site by Hf or Sb in ZrNiSn is effective for the reduction of the thermal conductivity or electrical resistivity, respectively [5][6][7][8][9][10][11][12][13][14]. When aiming to improve the thermoelectric performance of ZrNiSn, the systematic investigation about the effect of the substitution on the thermoelectric properties is indispensable.…”

“…Half-Heusler alloys MNiSn, where M = Ti, Zr or Hf, have been studied by many researchers for the candidate as the practical thermoelectric materials because of their good thermoelectric performance and low toxicity of the constituent elements [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. These alloys are crystallized in MgAgAs-type structure, i.e., defective Heusler alloys [19].…”

“…For example, the calculative VEC for MNi 1−x Co x Sn, where the Ni site is partially substituted by Co atom, is 18 − x. Up to now, such substitution effects have been investigated by many researchers [5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”